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author | Patrick J Volkerding <volkerdi@slackware.com> | 2011-04-25 13:37:00 +0000 |
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committer | Eric Hameleers <alien@slackware.com> | 2018-05-31 22:45:18 +0200 |
commit | 75a4a592e5ccda30715f93563d741b83e0dcf39e (patch) | |
tree | 502f745607e77a2c4386ad38d818ddcafe81489c /slackbook/html/process-control-foregrounding.html | |
parent | b76270bf9e6dd375e495fec92140a79a79415d27 (diff) | |
download | current-75a4a592e5ccda30715f93563d741b83e0dcf39e.tar.gz |
Slackware 13.37slackware-13.37
Mon Apr 25 13:37:00 UTC 2011
Slackware 13.37 x86_64 stable is released!
Thanks to everyone who pitched in on this release: the Slackware team,
the folks producing upstream code, and linuxquestions.org for providing
a great forum for collaboration and testing.
The ISOs are off to be replicated, a 6 CD-ROM 32-bit set and a
dual-sided
32-bit/64-bit x86/x86_64 DVD. Please consider supporting the Slackware
project by picking up a copy from store.slackware.com. We're taking
pre-orders now, and offer a discount if you sign up for a subscription.
As always, thanks to the Slackware community for testing, suggestions,
and feedback. :-)
Have fun!
Diffstat (limited to 'slackbook/html/process-control-foregrounding.html')
-rw-r--r-- | slackbook/html/process-control-foregrounding.html | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/slackbook/html/process-control-foregrounding.html b/slackbook/html/process-control-foregrounding.html new file mode 100644 index 00000000..7b185ba7 --- /dev/null +++ b/slackbook/html/process-control-foregrounding.html @@ -0,0 +1,138 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" + "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml"> +<head> +<meta name="generator" content="HTML Tidy, see www.w3.org" /> +<title>Foregrounding</title> +<meta name="GENERATOR" content="Modular DocBook HTML Stylesheet Version 1.7" /> +<link rel="HOME" title="Slackware Linux Essentials" href="index.html" /> +<link rel="UP" title="Process Control" href="process-control.html" /> +<link rel="PREVIOUS" title="Process Control" href="process-control.html" /> +<link rel="NEXT" title="ps" href="process-control-ps.html" /> +<link rel="STYLESHEET" type="text/css" href="docbook.css" /> +<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> +</head> +<body class="SECT1" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#840084" +alink="#0000FF"> +<div class="NAVHEADER"> +<table summary="Header navigation table" width="100%" border="0" cellpadding="0" +cellspacing="0"> +<tr> +<th colspan="3" align="center">Slackware Linux Essentials</th> +</tr> + +<tr> +<td width="10%" align="left" valign="bottom"><a href="process-control.html" +accesskey="P">Prev</a></td> +<td width="80%" align="center" valign="bottom">Chapter 11 Process Control</td> +<td width="10%" align="right" valign="bottom"><a href="process-control-ps.html" +accesskey="N">Next</a></td> +</tr> +</table> + +<hr align="LEFT" width="100%" /> +</div> + +<div class="SECT1"> +<h1 class="SECT1"><a id="PROCESS-CONTROL-FOREGROUNDING" +name="PROCESS-CONTROL-FOREGROUNDING">11.2 Foregrounding</a></h1> + +<p>If you need to interact with a backgrounded process, you can bring it back into the +foreground. If you've only got one backgrounded process, you can bring it back by +typing:</p> + +<table border="0" bgcolor="#E0E0E0" width="100%"> +<tr> +<td> +<pre class="SCREEN"> +<samp class="PROMPT">%</samp> <kbd class="USERINPUT">fg</kbd> +</pre> +</td> +</tr> +</table> + +<p>If the program is not done running, the program will take control over you terminal +and you will not be returned to a prompt. Sometimes, the program will finish running +while backgrounded. In this instance, you'll get a message like this:</p> + +<table border="0" bgcolor="#E0E0E0" width="100%"> +<tr> +<td> +<pre class="SCREEN"> +[1]+ Done /bin/ls $LS_OPTIONS +</pre> +</td> +</tr> +</table> + +<p>That tells you that the backgrounded process (in this case <tt class="COMMAND">ls</tt> +- not terribly interesting) has completed.</p> + +<p>It is possible to have several processes backgrounded at once. When this happens, +you'll need to know which process you want to bring back to the foreground. Just typing +<tt class="COMMAND">fg</tt> will foreground the process that was last backgrounded. What +if you had a whole list of processes in the background? Luckily, bash includes a command +to list all the processes. It's called <tt class="COMMAND">jobs</tt> and gives output +like so:</p> + +<table border="0" bgcolor="#E0E0E0" width="100%"> +<tr> +<td> +<pre class="SCREEN"> +<samp class="PROMPT">%</samp> <kbd class="USERINPUT">jobs</kbd> +[1] Stopped vim +[2]- Stopped amp +[3]+ Stopped man ps +</pre> +</td> +</tr> +</table> + +<p>This shows you a list of all the processes that are backgrounded. As you can see, they +are all stopped. This means that the processes are suspended. The number is a sort of ID +for all the backgrounded processes. The ID with a plus sign beside it (<var +class="LITERAL">man ps</var>) is the process that will be foregrounded if you just type +<tt class="COMMAND">fg</tt>.</p> + +<p>If you wanted to foreground <tt class="COMMAND">vim</tt>, you would type:</p> + +<table border="0" bgcolor="#E0E0E0" width="100%"> +<tr> +<td> +<pre class="SCREEN"> +<samp class="PROMPT">%</samp> <kbd class="USERINPUT">fg 1</kbd> +</pre> +</td> +</tr> +</table> + +<p>and <tt class="COMMAND">vim</tt> would spring back up to the console. Backgrounding +processes can be very useful if you only have one terminal open over a dialup connection. +You can have several programs running on that one terminal, periodically switching back +and forth between them.</p> +</div> + +<div class="NAVFOOTER"> +<hr align="LEFT" width="100%" /> +<table summary="Footer navigation table" width="100%" border="0" cellpadding="0" +cellspacing="0"> +<tr> +<td width="33%" align="left" valign="top"><a href="process-control.html" +accesskey="P">Prev</a></td> +<td width="34%" align="center" valign="top"><a href="index.html" +accesskey="H">Home</a></td> +<td width="33%" align="right" valign="top"><a href="process-control-ps.html" +accesskey="N">Next</a></td> +</tr> + +<tr> +<td width="33%" align="left" valign="top">Process Control</td> +<td width="34%" align="center" valign="top"><a href="process-control.html" +accesskey="U">Up</a></td> +<td width="33%" align="right" valign="top"><tt class="COMMAND">ps</tt></td> +</tr> +</table> +</div> +</body> +</html> + |